Sulphur burner



L. GILLETT SULPHUR BURNER Aug. 16, 192 7. 1,638,992

Filed March 28. 1925 2 Sheets-sneer. 2

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ra'rau'r OFFICE.

LOWBY GILLETT, OI SYOSSETT,

- PAINT, OF NEW YORK,

NEW YORK, ASSIGN'OIP- TO GENERAL CHEMICAL 001(- N. Y., A CORPORATION OF NEW YORK- SULPHUR Barman.

Application filed larch 28, 1925. Serial No. 19,018.

This invention relates to burners adapted.

for the burning of sulphur, especially sulphur of the kind commercially known as brimst-one. The object of the invention is 5 to improve upon the type of rotating burners em loyed for this purpose and to provide a new and improved construction adapted to be operated under either plus or minus gas or air pressure. Another object is to 1 improve upon the construction of the inlet and outlet connections for the passage of the air to, and the burner gases from, the burner casing so as to practically eliminate leakage of the burner gases through said 5 connections; the burner being mounted in such a manner that strains upon such connections due to the rotation of the burner will be eliminated. A further object is to provide a burner of the type set forth with means for feeding the sulphur thereto, such means being constructed and arranged to form a seal for preventing escape of the gases from the burner whenoperated under plus pressure. I Other objects will appear from the following descriptioii ,and from the accompany: ing drawingsjOrming a part hereof and wherein Fig.1 is a central, vertical, axial section through a rotating burner embodyand showing a portion 0 the combustion chamber to which the burner is connected, and Fig. 2 is a similar view of the burner equipped with alternative means for feeding the'sulphur and air thereto.

The burner consists of an outer cylindrical shell or casing 10 provided on its outer circumference with the annular runs or tires 10 which roll upon the trunnions 10", the entire weight of the burner being rotatably supported by said trunnions in a manner similar to the rotary kiln practice. Any suitable means such as the gear 13 and pinion 14, may be employed for rotating the casing, it bein understood that the pinion 14 is driven rom any suitable source of power. The end wall or head of the casing at the left handor entrance end of the burner is provided with a tubular inlet 11, a simlar tubular outlet 12 being provided at theright hand or delivery end of the casing. The tubular inlet 11 engages rotatably about a hollow casting 15 which in the example shown includes a pipe coil 16 through which cooling Water iscirculated. A flanged stufiing box 17 is bolted to the flanged end of the f the pedestal 29.

ving 28 and is inlet 11 and is counterbored to accommodate a packing gland 18 for forming a gas tight jomt. The casting 15 is bolted to a second hollow casting 19 which has eccentrically disposed therein a cylinder 20, dividing the interior of said castings into the separate passages 21 and 22. The inner passage 21 contains a helical feeding the sulphur into the casing 10 of the burner, while the outer passage 22 forms a conduit through which air is supplied to the casing 10 from an air supply conduit 24. The air supply conduit 24 is bolted to the casting 19, WhlCll in turn is suitabl secured to a pedestal 25. Secured to the liaft hand face of the hollow casting 19 is a hopper 26 through the lower end of which the screw conveyer 23 passes, the end of said conveyer passing outwardly through the side walls of said hopper and being provided with any suitable means, such as the pulley or sprocket 26" for rotating it. The outer periphery of the conveyor 23 forms a neat running fit with the annular partition 20 to prevent gas leakage past the conveyer.

. The flanged outlet 12 at the delivery end of the burner engages rotatably' about a casting 27, the flanged end 27" of which is secured to a hollow casting 28 mounted u on The connecting pipe 2? is provided with a water cooling coil 30 and a flanged stufling box 31 in the counterbored end of which the gland 32 is received, the consirgimtion. being similar to that of the cast- 111 The casting 28 has bolted to the top flange thereof an elbow 33 which communicates with an additional air suppl conduit 34 for supplying the air required or the complete combustion of the sul hur within the combustion chamber 35, this chamber being provided with the usual baflles 36. The delivery end of the elbow33 extends into the castdirected towards a connecting pipe 35 leading to the combustion chamber 35 thus causing the air from the conduit 34 to produce a suction or'injector effect upon the gases passing from the burner to said chamber.

Mounted within the outer casing 10 of the burner A is an inner drum 37 provided with a plurality of rolling rings 38 u on which the drum is supported for rotation on the inner surface of the casing. Additional cooling means for the tubular inlet and outscrew conveyer 23 for let 11 and 12 and associated parts may be provided. For this purpose, 1 have shown the faucets 39 and 40 located above the stutling boxes 17 and 31 respectively, the water or other cooling medium fiowlng on and around the stuffing boxes and dropping into the drip pans 41 and 42 respectively.

The operation of the burner illustrated in Fig. 1 is as follows: The hopper 26 is filled with sulphur preferably in a powdered state, and such sulphur is forced into the casing 10 by the rotation of the screw conveyer 23 and, filling the cylinder 20, forms a seal to prevent the escape of burner gases through the hopper. The volatilization of the sulphur in the burner is started in any convenient manner, as for example, by applying heat to the under side of the burner, and theair required for supporting such volatilizat on is supplied through the air supply conduit 24. The current of air from the conduit 24 passing around'the cylinder 20 assists the water cooling devices in keeping the tubular Inlet 11 and associated parts cooled and thereby prevents the heat from the burner from melting the sulphur while it is being fed to the burner by the conveyer 23. thus 1nsuring that the cylinder 20 will be filled with the sulphur to maintain the seal. The outer casing 10 being rotated causes the inner drum 37 also to'be rotated, and the molten sulphur within the burner adheres to the walls of both casings, thus exposing a large surface area of the sulphur, the provision of the inner rotatable drum greatly increasing the capacity of the burner." The sulphur gases given off during the volatilization pass out from the burner through the tubular outlet 12, castings 27 and 28 and the connecting pipe 35 to the combustion chamber 35, the air admitted through the conduit 34 mixing with the gases to complete the combustion in said combustion chamber and as heretofore pointed out also serving to produce a suction or injector effect which promotes the circulation of the gases through the apparatus.

In the form shown in Fig. 2, the sulphur is fed to a melting pan located on top of the combustion chamber 35. The molten sulphur flows from the pan 50 through a feed pipe 51, the lower end of which extends through the tubular outlet 12 of the burner A and terminateswithin the casing 10, adja cent to the drum 37*.in the downwardly directed nozzle 52. A return bend 51 is provided in the pipe 51 to form a trap in which the molten sulphur establishes a liquid seal to prevent escape of gases from the burner. Air. for supporting combustion within the chamber 35 is supplied through the conduit 34, which is connected to a housing or casing53 surrounding the tubular outlet'12 said casing being connected by the pipe 54 with the combustion chamber .wall of the chamber 35.

escaping to the atmosphere through any opening which might exist about the meeting or jolnt line of the outlet 12 with the left hand The construction of the tubular inlet 11 of the burner A? and casting 15, stufling box 17 and gland 18 is practically the same as the corresponding part of the burner A. As the hopper and screw conveyer shown in 1 are not 'e'm- 'ployed 1n the example Illustrated in Fig. 2,

the air supply conduit 24 is connected directly to the end of the casting 15 and is preferably provided with swivel. joints to the main air line to eliminate trouble due to the movement of the burner casing.

In the form shown in Fig. 2. the molten sulphur from the pan 50 flowsinto the casing 10 through the pipe 51 and is delivered A to the bottom of said casing by the nozzle 52. Air for-the burning of the sulphur in the burner A is supplied through the air conduit 24 and the gases given off pass through the tubular outlet 12 and connecting pipe 54 to the combustion chamber 35, the air from the air supply conduit 34 mixing with the gases and also producin a suction effect which assists the circulation of the gases as with the construction shown in Fig. 1.

While the stuffing boxes 17 and 31, glands 18 and 32, and tubular conduits 11, and 12, are bolted together and rotate with the casing 10 in engagement with the hollow castings 15, and 27 respectively, no appreciable lateral strains are placed upon these parts, nor do they perform any supporting function as the entire weight of the casing and the contents thereof is supported by the tires 10 and trunnions 10 -A similar construction is employed at the air inlet end of burner A, but the arrangement of the housing 53 about the end of the tubular outlet 12 and the termination of said outlet wall within the interior of said housing renders the use of any packing or stufling boxes unnecessary at the outlet end of the burner. and such construction is preferred over that construction shown in Fig. 1.

It will be understood that various changes ing and said drutn being mounted for rotation about horizontal axesto carry a broad film of said molten sulphur upon their surfaces during such rotation.

2. In a sulphur burner, a rotary-casing adapted to contain a quantity of molten sulphur, an air supply conduit to supply air under pressure -to said casing, and means associated with said conduit to form a seal and prevent escape of sulphur gases from said casing.

3. In a sulphur burner, a casing mounted for rotation upon a horizontal axis and adapted to contain molten sulphur. a drum mounted within said casing and in free communication therewith. and means for supporting said drum rotatably upon the inner surface of saidcasing.

4; In a sulphur burner, a casing mounted for rotation upon a horizontal axis and adapted to contain molten sulphur. a drum mounted within said casing. and means for supporting said drum rota-tably upon the inner surface of said casing comprising a plurality of rolling rings interposed between said casing and drum.

5. In a sulphur burner. a rotary casing provided with a tubular inlet. a screw conveyer passing through said inlet. a hopper for delivering thesulphur to said conveyer. and an annular partition surrounding said conveyer and forming therewith a seal to prevent the escape of gases from said burner.

6. In a sulphur burner. a rotary casing provided with a tubular inlet conduit. an annular partition passing through said conduit to divide itinto a pair of passages. a screw conveyer mounted within one of said passages, and an air supplying pipe for supplying combustion air connected with the other of said passages.

7. In an apparatus for burning sulphur, a combustion chamber, a sulphur burner, said sulphur burner comprising a rotary casing. a melting pan associated with said combustion chamber for producing a preliminary melting of the sulphur, and a self' sealing conduitleading from said melting.

span to the interior of said casing.

8. In an apparatus for burning sulphur, a combustion chamber, a sulphur burner, said sulphur burner comprising a rotary casing provided with a tubular inlet, and a tubular outlet connected with said combustion chamber, a conduit connected with said inlet for supplying combustion air to said burner and a second conduit associated with said outlet to supply combustion air to said combustion chamber, said second conduit being connected with a supply line containing air under pressure whereby the combustion air supplied to said combustion chamber conduit will exert a through said second said outlet upon the suction efiect throu h gases generated wit in said casing.

9. In a sulphur burner, a rotary casing adapted to contain molten sulphur, a conduit leading into said casing to supply sulphur thereto, and means associated with said conduit to form a seal for preventing escape ofgases from said burner.

10. In a sulphur burner, a casing adapted to contain a quantity of molten sulphur, said casing being provided with a tubular outlet, an air conduit for supplying combustion air terminating in a housing surrounding said tubular outlet, said housing having one wall thereof extending about said tubular outlet between the end of said outlet and'the main portion of said casing whereby the current of air passing through said air conduit and housing will prevent escape to the atmosphere of the burner gases between said wall of said. housing and said tubular outlet.

11.In a sulphur burner, a rotary casing adapted to contain molten sulphur, said casing having a tubular outlet through which the gases are passed to a 'combustion chamher, an air conduit for supplying combustion air to said chamber, rotatably connected with said tubular outlet and having its delivery end terminatingadjacent to and beyond the delivery end of said outlet to produce an injector effect upon the gases generated in said burner to draw said gases through said outlet. and the connecting joint between said conduit and tubular outlet being. located between the end of said outlet and the main portion of said casing whereby escape to the atmosphere of said gases through said connecting joint will be prevented by the incoming current of air.

12. In a sulphur burner, a rotary casing provided with a tubular outlet, an air supplying conduit having its delivery end surrounding said outlet, and said outlet being rotatably engaged with a wall of said conduit and projecting into said conduit beyond said wall whereby the air passing through said conduit will sweep around said outlet and prevent access, to the connection joint between said outlet and wall, ofthe burner gases issuing from said outlet. I

13. In a sulphur burner, a casing, a conveyer for introducing sulphur into said cas ing, and an air supply pipe surrounding said conveyer for introducing combustion air into said burner and for maintaining said conveyer at a relatively low temperature to prevent melting of the sulphur while it is being fed by said conveyer to said casing.

In testimony whereof I have hereunto set 

